JP2008293927A - Electrodeless discharge lamp device, and luminaire using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrodeless discharge lamp device allowing an electrodeless discharge lamp to be surely mounted to a coupler, and capable of preventing drop of the electrodeless discharge lamp. <P>SOLUTION: The electrodeless discharge lamp device includes: the electrodeless discharge lamp A having a nearly-bulb-shaped gastight vessel 1 having a housing recessed part 1a formed therein, and having a base 2 mounted on the housing recessed part 1a side of the gastight vessel 1; and the coupler B inserted in the housing recessed part 1a to hold the electrodeless discharge lamp A. In the electrodeless discharge lamp A, a pair of engagement projections 2c respectively projecting toward the inside from symmetric positions by interposing a center axis are formed in the base 2 and, in the coupler B, engagement groove parts 9 are formed on the outer surface of a support member 6. The engagement groove part 9 is provided with a holding part 9e engaging and holding the engagement projection 2c at a lighting position where the electrodeless discharge lamp A lights up, and a tentatively holding part 9d engaging and holding the engagement projection 2c at an extinguishing position where the electrodeless discharge lamp A doesn't light up. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electrodeless discharge lamp device and a lighting fixture using the same.

  Conventionally, an electrodeless discharge lamp device has been proposed in which holding means for holding an electrodeless discharge lamp are provided in two stages in the longitudinal direction of the coupler (see, for example, Patent Document 1). In this electrodeless discharge lamp device, a plurality of protrusions projecting inwardly are provided on the inner surface of the base portion on the electrodeless discharge lamp side along the circumferential direction, and the protrusions are provided on the outer surface of the mounting member on the coupler side. In corresponding portions, the first and second grooves are provided at different positions in the longitudinal direction of the mounting member and along the circumferential direction.

In this electrodeless discharge lamp device, when the electrodeless discharge lamp is rotated from the state in which the electrodeless discharge lamp is inserted into the coupler, each projection is inserted into the corresponding first groove and the inside of the first groove is surrounded. Move in the direction. Subsequently, when the electrodeless discharge lamp is rotated to a predetermined position and pulled forward, each protrusion is inserted into the corresponding second groove, and when the electrodeless discharge lamp is further rotated from this state, each protrusion is The electrodeless discharge lamp is mounted and held on the coupler at a predetermined position.
Japanese Patent Publication No. 11-508405 (pages 7 to 10 and FIGS. 1 to 10)

  In the electrodeless discharge lamp device shown in Patent Document 1 described above, the protrusions are locked at the lower edge of the first groove even when each protrusion is in the corresponding first groove, Although the electrodeless discharge lamp is prevented from falling, the electrodeless discharge lamp and the coupler are magnetically coupled in this state, and the electrodeless discharge lamp is turned on. There was a problem that it was difficult to understand that the wearing of the was insufficient. In addition, if the electrodeless discharge lamp is continuously used in this state, for example, the electrodeless discharge lamp may rotate due to vibration or the like, and all the protrusions may come off from the corresponding first groove. There was a case.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an electrodeless discharge lamp that can be securely attached to a coupler and that prevents the electrodeless discharge lamp from falling. The object is to provide an electrode discharge lamp device.

  The invention of claim 1 has an electrodeless discharge lamp having a light-transmitting hermetic container with a recess formed therein, an induction coil for generating a high-frequency electromagnetic field in the hermetic container, and is inserted into the recess. A coupler that holds the electrodeless discharge lamp at a lighting position where the electrodeless discharge lamp and the induction coil are magnetically coupled, and a high frequency power source that applies a high frequency current to the induction coil, with the concave portion facing upward. When the electrodeless discharge lamp held by the coupler is released from the coupler, the electrodeless discharge lamp is separated from the induction coil by a predetermined distance in the direction of attaching or detaching the electrodeless discharge lamp to the coupler, and the electrodeless discharge lamp is turned off. The coupler is provided with temporary holding means for holding the electrodeless discharge lamp.

  The invention of claim 2 is characterized in that the electrodeless discharge lamp device of claim 1 is used.

  According to the first aspect of the present invention, since the coupler is provided with the temporary holding means for holding the electrodeless discharge lamp at the extinguishing position of the electrodeless discharge lamp, the holding of the electrodeless discharge lamp by the coupler is released at the lighting position. Even in this case, the electrodeless discharge lamp can be held by the temporary holding means to prevent the electrodeless discharge lamp from falling, and when there is an electrodeless discharge lamp at the extinguishing position, the electrodeless discharge lamp and the induction coil are magnetically Since the electrodeless discharge lamp does not light even when a high frequency current is applied to the induction coil, it can be easily determined that the electrodeless discharge lamp is not sufficiently attached to the coupler. There is an effect. Furthermore, since the electrodeless discharge lamp is not lit when the electrodeless discharge lamp is in the extinguished position, the electrodeless discharge lamp does not continue to be used in this state, and therefore the electrodeless discharge lamp does not fall due to vibration or the like. is there.

  According to the invention of claim 2, by using the electrodeless discharge lamp device of claim 1, there is an effect that it is possible to provide a lighting fixture having improved safety.

  An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1 (a), the lighting fixture of the present embodiment is disposed downward by inserting and connecting an electrodeless discharge lamp A to, for example, a coupler B fixed to a ceiling surface (not shown). An electrodeless discharge lamp device is used, and it is used for illumination in a room or the like.

  The electrodeless discharge lamp device includes an electrodeless discharge lamp A, a coupler B that is magnetically coupled to the electrodeless discharge lamp A and mechanically holds the electrodeless discharge lamp A, and a high-frequency power source 12. .

  As shown in FIG. 3, the electrodeless discharge lamp A has an airtight container 1 formed in a substantially light bulb shape with a translucent material (for example, glass or the like), and one end side of the airtight container 1 (FIG. 3A). A substantially cylindrical storage recess 1a is formed inwardly on the lower side, and a discharge gas made of a rare gas such as argon is enclosed in the hermetic container 1. Further, in the airtight container 1, a base 2 for attaching to the coupler B is attached to the end portion on the opening side of the housing recess 1 a.

  The base 2 has a substantially cylindrical base body 2a that is open at both ends, and a substantially cylindrical guide portion 2b formed concentrically with the base body 2a is integrally provided inside the base body 2a. A pair of engaging projections 2c projecting inward from symmetrical positions across the central axis are integrally provided at the opening end on one end side (lower side in FIG. 3A) of the portion 2b.

  On the other hand, as shown in FIGS. 1B and 2, the coupler B includes a induction coil 11 that generates a high-frequency electromagnetic field in the hermetic container 1 when a high-frequency current is applied, and a pair around which the induction coil 11 is wound. Ferrite cores 3a and 3b, a cylinder 4 thermally coupled to the ferrite cores 3a and 3b, radiating heat generated in the ferrite cores 3a and 3b, and holding the ferrite cores 3a and 3b from the inside, and the ferrite core 3a And a support member 6 that supports 3b from the outer peripheral side.

  As shown in FIGS. 1B and 2, the cylinder 4 is formed in a hollow, substantially cylindrical shape, for example, with aluminum having high heat conductivity, and a base that supports the cylinder 4 is provided at the lower end of the cylinder 4. A base (not shown) is integrally provided, and a collar part 10 for attaching the coupler B to a ceiling surface or the like is integrally provided at the lower edge of the base.

  The ferrite cores 3a and 3b are formed in a bent plate shape whose cross section is curved in an arc shape by a soft magnetic material such as Mn—Zn having good high-frequency magnetic characteristics, for example. It arrange | positions in the state which faced the inner surface.

  The support member 6 has a small-diameter cylindrical main body 13, and a guide 7 that integrally supports the ferrite cores 3 a and 3 b from the outer peripheral side is provided on the upper side of the main body 13, and below the main body 13. The large-diameter cylindrical base 8 that covers the base of the cylinder 4 is integrally provided. A gap (not shown) is provided at one end in the width direction of the guide 7, and the ferrite cores 3 a and 3 b are guided by using an elastic resin 5 such as silicone rubber, for example, with a part thereof being inserted into the gap. 7 and the cylinder 4. In this state, the cylinder 4 and the ferrite cores 3 a and 3 b are thermally coupled via the elastic resin 5, and the heat generated in the ferrite cores 3 a and 3 b is transferred to the cylinder 4 via the elastic resin 5. Since the heat transmitted to the cylinder 4 is radiated to the outside through the flange portion 10, an excessive temperature rise of the ferrite cores 3a and 3b is prevented. In FIG. 2, the elastic resin 5 between the ferrite cores 3a and 3b and the cylinder 4 is not shown.

  An induction coil 11 is wound around the outer surfaces of the ferrite cores 3a and 3b from one end side to the other end side of the ferrite cores 3a and 3b. The induction coil 11 is electrically connected to a high frequency power source 12 via a wire (not shown). When a high frequency current is applied from the high frequency power source 12, a high frequency electromagnetic field is generated in the hermetic container 1 of the electrodeless discharge lamp A. generate.

  Further, on the outer surface of the main body 13 in the support member 6, a pair of engagement grooves 9, 9 that hold the electrodeless discharge lamp A by engaging with a pair of engagement protrusions 2 c, 2 c provided on the base 2. Are provided opposite to each other in the diameter direction of the main body 13. As shown in FIG. 1C, each engagement groove 9 has a vertical groove 9a that is recessed along the longitudinal direction of the main body 13, and a vertical groove 9a is formed at the lower edge of the vertical groove 9a. A transverse groove 9b is provided continuously in a direction perpendicular to the left side (left direction in FIG. 1C). Further, a vertical groove 9c is continuously recessed toward the lower side edge of the horizontal groove 9b, and a temporary holding portion (temporary holding means) 9d is continuously recessed toward the upper side. . Further, a holding portion 9e is continuously recessed in the lower end edge of the vertical groove 9c in a direction perpendicular to the vertical groove 9c and in a direction opposite to the horizontal groove 9b. A locking projection 9f is integrally provided in the vicinity of the connection portion between the 9c and the holding portion 9e. In the electrodeless discharge lamp device of this embodiment, the lateral groove 9b and the holding portion 9e are provided with a distance of D1 (D1 ≧ 2 cm) in the longitudinal direction of the main body portion 13 (vertical direction in FIG. 1C). Thus, by separating the electrodeless discharge lamp A from the coupler B by a distance D1 or more, the magnetic coupling between the hermetic container 1 and the induction coil 11 is released.

  Here, the procedure for mounting the electrodeless discharge lamp A to the coupler B will be described with reference to FIG. First, when the electrodeless discharge lamp A is moved upward with respect to the coupler B (direction C in FIG. 5A), as shown in FIG. It is inserted into 9a and moves upward in the longitudinal groove 9a (direction D in FIG. 5B). Next, when the electrodeless discharge lamp A is rotated counterclockwise (E direction in FIG. 5 (c)) from this state, the engaging protrusion 2c moves leftward in the lateral groove 9b (F in FIG. 5 (c)). Direction). Subsequently, when the electrodeless discharge lamp A is moved in the upward direction (G direction in FIG. 5D), the engagement protrusion 2c moves upward in the vertical groove 9c (see FIG. 5E). 5 (e) in the H direction). Thereafter, when the electrodeless discharge lamp A is rotated counterclockwise (the J direction in FIG. 5 (f)), the engagement protrusion 2c moves to the left (the K direction in FIG. 5 (f)) to lock. When the electrodeless discharge lamp A is rotated against the protrusion 9f and further against the drag of the locking protrusion 9f, the engaging protrusion 2c gets over the locking protrusion 9f and is disposed in the holding portion 9e. A is mounted and held on coupler B. In the mounted state, the engagement protrusion 2c is restricted from moving toward the vertical groove 9c by the locking protrusion 9f, and the engagement protrusion 2c is prevented from returning to the vertical groove 9c.

  In this state, since the hermetic container 1 of the electrodeless discharge lamp A is magnetically coupled to the induction coil 11 of the coupler B, when a high-frequency current is applied to the induction coil 11 by the high-frequency power source 12, the hermetic container 1 A high frequency electromagnetic field is generated inside, and the internal discharge gas is excited by this high frequency electromagnetic field, and the electrodeless discharge lamp A is turned on. That is, the position shown in FIG. 5F is the lighting position.

  Conversely, when removing the electrodeless discharge lamp A from the coupler B, the electrodeless discharge lamp A is first rotated clockwise (the direction opposite to the J direction in FIG. 5F), and then the electrodeless discharge lamp A is rotated. A is moved downward (the direction opposite to the G direction in FIG. 5D). Further, after the electrodeless discharge lamp A is rotated clockwise (the direction opposite to the E direction in FIG. 5C), the electrodeless discharge lamp A is moved downward (the direction opposite to the C direction in FIG. 5A). Direction), the electrodeless discharge lamp A is removed from the coupler B.

  Here, when the engagement protrusion 2c is detached from the holding portion 9e and the holding of the electrodeless discharge lamp A in the lighting position is released, the engagement protrusion 2c moves in the vertical groove 9c as shown in FIG. 4B. As shown in FIG. 4A, the electrodeless discharge lamp A is temporarily held by the coupler B, but the temporary holding portion 9d is formed below the lateral groove 9b. By providing the warp, the engagement protrusion 2c does not move to the lateral groove 9b side due to vibration or the like, and therefore the electrodeless discharge lamp A can be prevented from falling. In this state, the engagement protrusion 2c is disposed at a position away from the holding portion 9e by a distance D1 or more, and the electrodeless discharge lamp A and the coupler B are separated from each other by a distance D1 or more. Since the electrodeless discharge lamp A is not lit even when a high frequency current is applied to the induction coil 11 by the high frequency power supply 12, the electrodeless discharge lamp A is not sufficiently mounted on the coupler B. It can be easily determined. Further, in the state where the electrodeless discharge lamp A is temporarily held by the coupler B, the electrodeless discharge lamp A is not lit, so it is not continuously used in this state, and the electrodeless discharge lamp A falls due to vibration or the like. There is nothing to do. In the present embodiment, the position shown in FIG. 4 is the extinguishing position.

  Further, in the present embodiment, when the holding of the engaging projection 2c at the lighting position by the holding portion 9e is released, the electrodeless discharge lamp A is temporarily held by holding the engaging projection 2c on the temporary holding portion 9d. However, the engaging protrusion to be held by the temporary holding portion 9d may be provided separately from the engaging protrusion 2c.

  Further, as shown in FIG. 6, an engagement projection 2d is provided at the lower end of the base body 2a, the engagement projection 2c is engaged with the holding portion 9e, and the engagement projection 2d is provided on the base portion 8 of the support member 6. The electrodeless discharge lamp A may be held by being engaged with a holding portion (not shown). In this case, the electrodeless discharge lamp A is held double by the holding portion 9e and the holding portion of the base portion 8. Therefore, the electrodeless discharge lamp A is more difficult to be removed from the lighting position, and safety is improved.

  Furthermore, by using an electrodeless discharge lamp device using the electrodeless discharge lamp A as shown in FIG. 3 or FIG. 6, a lighting fixture with improved safety can be provided.

  Note that the shapes of the engagement groove 9 and the engagement protrusions 2c and 2d are not limited to the present embodiment, and may be any shape as long as the electrodeless discharge lamp A is held by the coupler B and temporarily held.

(A) is a front view schematically showing an electrodeless discharge lamp device used in the lighting fixture of the present embodiment, (b) is an exploded perspective view of the coupler used in the above, and (c) is a coupler used in the above. FIG. It is sectional drawing of the coupler used for the same as the above. The electrodeless discharge lamp used for the above is shown, (a) is a sectional view seen from the front, and (b) is a bottom view of the base. (A), (b) is operation | movement explanatory drawing same as the above. (A)-(f) is another operation | movement explanatory drawing same as the above. The other electrodeless discharge lamp used above is shown, (a) is sectional drawing seen from the front, (b) is a bottom view of a nozzle | cap | die.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airtight container 1a Storage recessed part 9d Temporary holding part (temporary holding means)
9e Holding part 11 Induction coil A Electrode discharge lamp B Coupler

Claims (2)

  An electrodeless discharge lamp having a light-transmitting hermetic container having a recess formed therein, an induction coil for generating a high-frequency electromagnetic field in the hermetic container, and being inserted into the recess and guided to the electrodeless discharge lamp A coupler that holds the electrodeless discharge lamp at a lighting position where the coil is magnetically coupled, and a high-frequency power source that applies a high-frequency current to the induction coil, and is held at the lighting position with the recess facing upward When the holding of the electrodeless discharge lamp by the coupler is released, the electrodeless discharge lamp is separated from the induction coil by a predetermined distance in the direction of attaching / detaching the electrodeless discharge lamp to the coupler, and the electrodeless discharge lamp is turned off at the position where the electrodeless discharge lamp is turned off. An electrodeless discharge lamp device characterized in that a temporary holding means for holding a discharge lamp is provided in a coupler.   A lighting fixture using the electrodeless discharge lamp device according to claim 1.

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